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Chromium(VI)  is considered a hazardous, carcinogenic species, destruction of which may be accomplished by the process shown in the balanced equation below:             4 Zn (s) + K2Cr2O7 (aq) + 7 H2SO4 (aq) → 4 ZnSO4 (s) + 2 CrSO4 (s) + K2SO4 (aq) + 7 H2O (l) Which is the limiting reactant when 0.900moles of H2SO4 and 0.900 moles of  K2Cr2O7 react in excess Zn?

6.0 km is how many micrometers?

Sarah partnered with Publix to run an experiment and look at real sales data. Sarah was running a ________.

In the context of the different types of involvement, _____ exists when we show interest in an offering or activity over a long period of time.

The molarity of a solution prepared by diluting 43.72 mL of 5.005 M aqueous K2Cr2O7  to 500. mL is __________.

Upon reaction of 38.6 g of silver nitrate with excess copper(II) sulfate, 34.1 g of silver sulfate was obtained according to the balanced equation: CuSO4(aq) + 2 AgNO3 (aq)⟶Cu(NO3)2(aq) + Ag2SO4(s) What is the percent yield of silver sulfate?  (If you wish, show your work for possible partial credit.)

Which of the following is an example of a connectedness symbol?

Determine the number of atoms of hydrogen in  0.2355 moles of caffeine, C8H10N4O2.  (If you wish, you can show math work for possible partial credit.)

Silver ions can be precipitated from aqueous solutions by the addition of aqueous carbonate:             2  AgNO3 (aq) + Na2CO3 (aq)  →  Ag2CO3(s) + 2 NaNO3 (aq)   Silver carbonate is virtually insoluble in water so that the reaction appears to go to completion. What volume of a 3.550 M Na2CO3 must be added to a solution containing 0.700 mol of AgNO3 to completely precipitate the silver? (If you wish, show your work for possible partial credit.)

Identify the spectator ions in the following molecular equation. Na2CO3(aq) + Sr(NO3)2(aq)  →  2NaNO3(aq) + SrCO3(s)